Programmable AC Power Source / AC Variable Frequency Power Supply Series

Voltage and Frequency Control for Product Verification

The KINGPO Programmable AC Power Source provides clean and stable sine-wave AC output for product development, quality assurance, production-line testing and laboratory power supply.

It is used when a product cannot be tested reliably with direct mains power, or when the test requires controlled voltage and frequency conditions. Typical examples include 50Hz / 60Hz operation checks, export market voltage simulation, over-voltage / under-voltage tests and long-time product aging tests.

This product is not a VFD motor drive. It is a test power source for supplying the DUT with programmable AC output. It may also be described as an AC Variable Frequency Power Supply, Variable Frequency AC Power Supply or Programmable AC Source.

Programmable AC Power Source Range and Quick Selection

For laboratory benches, small appliances, adapters and medium-power products, AC11 models are usually the first range to review. For higher single-phase capacity, AC31 models are available. For three-phase DUTs, industrial loads, motors or larger test systems, A13 / AC13 / AC33 / A33 models should be selected according to capacity and installation requirements.

Technical Specifications

General Specifications

Single-Phase Output Models

AC11 Series — 500VA to 10kVA

AC31 Series — 15kVA to 120kVA

Three-Phase Output Models

Three-Phase Output I — 3kVA to 45kVA

Three-Phase Output II — 60kVA to 200kVA

How to Select the Right Programmable AC Power Source

The correct model should be selected according to the DUT power requirement, output phase, startup current, voltage range, frequency range and test duration.

 1 . Confirm the Output Phase

Use a single-phase model when the DUT operates from single-phase AC power. Choose a three-phase model when the DUT requires three-phase output, such as industrial equipment, motor-related products or three-phase power systems.

 2 .Check Rated Power and Startup Current

The selected capacity should be higher than the DUT’s continuous operating power. Motors, compressors, transformers and switching power supplies may draw high startup or inrush current, so additional capacity margin should be considered.

 3 .Confirm Voltage and Frequency Range

For export product testing, confirm the required voltage and frequency according to the target market. Common requirements include 50Hz / 60Hz operation and different rated voltage conditions. For 45–400Hz applications, confirm the applicable model or option before quotation.

 4 .Confirm Test Duration and Installation Conditions

Short functional tests, production-line testing and long-time aging tests may require different capacity margins and cooling conditions. Installation space, ventilation, cabinet dimensions and remote communication requirements should also be checked before final selection.

Typical Applications

Export Product Testing

The programmable AC power source helps manufacturers simulate different voltage and frequency conditions for products intended for international markets. It is suitable for checking operation under target market power conditions before shipment, internal approval or certification preparation.

Home Appliance Testing

Typical DUTs include air conditioners, coffee machines, washing machines, microwave ovens, refrigerators, vacuum cleaners and related appliances. The AC source provides repeatable power conditions for R&D, QA and production-line verification.

Motors, Compressors and Electronic Loads

The equipment can be used with switching power supplies, transformers, electronic ballasts, AC fans, UPS units, chargers, relays, compressors and motors. For inductive or high-inrush loads, model selection should be confirmed carefully.

IT and Office Equipment

Fax machines, copiers, printers, scanners, servers, displays and office equipment may require stable AC input during functional checks, quality inspection or product development.

Laboratory QA and Production-Line Verification

In laboratory and manufacturing environments, the system can support AC power tests, product lifetime testing, safety test preparation, EMC preparation, OQC / FQC and product R&D.

Technical Features

Programmable Voltage and Frequency Output

Output voltage, frequency and operating parameters can be set from the operation panel or touch-screen digital keypad, allowing users to adjust test conditions for different DUT requirements.

HMI Display and Real-Time Monitoring

Single-phase models use a 4.3-inch LCD display, while three-phase models use a 7-inch touch screen. The system displays set voltage, set frequency, set current, output voltage, output current, active power, PF value, operating time and protection status.

Programmable Operation Depending on Configuration

Programmable sequence mode, output current limit and parameter memory functions are available depending on the selected model configuration. These functions support repeatable power test conditions.

RS232 / RS485 Remote Communication Options

RS232 / RS485 interface options support remote control, telemetry, data exchange and monitoring of load electrical characteristics. This is useful for automated test systems and production-line integration.

Fault Diagnosis and Protection Indication

Fault self-diagnosis and protection information are displayed directly on the screen, helping operators identify abnormal operating conditions and simplify troubleshooting.

Operating Concept and Protection Functions

The KINGPO programmable AC power source converts input AC power into stable programmable AC output through the following process:

AC Input → Rectifier → Filter → Power Inverter → Stable AC Output

Single-phase or three-phase mains input is converted to DC through the rectifier stage. The DC bus is smoothed by the filter, and the power inverter generates the required programmable AC output for the DUT.

Protection behavior may vary depending on model configuration and load condition.